Collection ProceduresCâu 24 / 100
A patient is told to pump the fist repeatedly while the tourniquet is on. Which result is most affected?
a.Hemoglobin, which may be falsely decreased
b.Potassium, which may be falsely elevated
c.Sodium, which may be falsely decreased
d.Platelet count, which may be falsely elevated
Giải thích
Vigorous fist pumping causes muscle cells to release potassium into the local circulation, so the measured potassium can be falsely high. Patients may make a fist once to help the vein, but repeated pumping is discouraged. Hemoglobin, sodium and platelet counts are not meaningfully changed by this mechanism.
Trích dẫn luật: CLSI GP41Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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